Dwed

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 dwed - Text file editor and IDE for MS-DOS and 8086/88 CPU (IBM XT-grade PC) designed in modern style.

 Authors:   Viacheslav Komenda
 Download:  https://github.com/DosWorld/dwed
 Family:    MsDosEditors
 License:   MIT
 Availability: yes
 Platform:  Dos

Features:

Support files with size over 64k
Support basic syntax highlight (C/C++/C--, Pascal, Basic, Assembler, Xml/Html?, text files etc)
Support multiple file editing at the same time
Support internal clipboard (size up to 32k)
Support unix-like text files for open
Dont require DPMI-server or 80286 CPU
Support Long File Names (LFN)
Support user's color scheme (via config-file)
Support user's shell script running by hotkeys F5, F8, F9.
You can disable highlight and receive good speed with XT.
Support mouse
Build-in calculator and ASCII-table.

Restrictions:

This software is writen in Borland Pascal, so string length is limited to 255 chars.
DOS-conventional memory will be enough to load file up to ~300k..400k (expect - 300k border). You can use DPMI-version, if you need more memory and you have modern CPU.
DWED don't parse file content in the same way, as compilers - so, some time syntax highlight can fail (be wrong). I know it. But it is better then nothing.
No Undo/Redo? functionality. The reason is the same as why i dont build AST for syntax highlight - here is no memory/CPU speed for it.